
Internal Time
Chronotypes, Social Jet Lag, and Why You're So Tired
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Narrated by:
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Grover Gardner
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By:
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Till Roenneberg
About this listen
Early birds and night owls are born, not made. Sleep patterns are the most obvious manifestation of the highly individualized biological clocks we inherit, but these clocks also regulate bodily functions from digestion to hormone levels to cognition. By understanding and respecting our internal time, we can live better.
PLEASE NOTE: When you purchase this title, the accompanying reference material will be available in your My Library section along with the audio.©2012 DuMont Buchverlag, Cologne ( Germany) (P)2013 Gildan Media LLCListeners also enjoyed...
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Critic reviews
What listeners say about Internal Time
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- G011
- 01-22-14
Required Reading for Humans
This book provides an inclusive and scientifically supported exposition on sleep. Not only will you learn how sleep works on a theoretical level, you will also understand the practical consequences.
For example, Roenneberg explains that every person has a certain chronotype (from "early" to "late"). The biological clock of early chronotypes generates "internal days" shorter than 24 hours. This biological clock needs to be synchronised to the actual or "external" day/night cycle, resulting from the earth's rotation. This synchronisation happens (among other things) primarily through exposure to light. To synchronise a shorter "internal day", a person needs to be exposed to more light, which means waking earlier. The reverse is true for "late" chronotypes.
Your chronotype also dictates bodily functions (like appetite) and performance (like alertness or problem solving). A person with a late chronotype is therefore much more likely to perform worse in the morning than a person with an early chronotype. For such a person, morning can feel more like the middle of the night!
Furthermore, Roenneberg explains that your biological clock is in fact a biological phenomenon that cannot be altered by "simply showing some discipline". As he puts it: "early birds and night owls are born, not made".
Unfortunately, this is poorly understood in our "nine to five" society. A person with a late chronotype is often perceived as inferior. (This is even evident is our language, e.g. "the early bird gets the worm".) This person actually experiences "social" jet lag (possibly for his/her entire life). This social jet lag is similar to actual jet leg, in the sense that it is as if living in one time zone, while going to work in another. Needless to say, this has an enormous impact on a person's quality of life.
All of this and more is explained in clear language, but with scientific authority. I also found the book to be just the right length.
I believe this book contains knowledge every person should be aware of. At the very least people who struggle with sleep in any way should read this book. It will provide you with a great many insights.
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18 people found this helpful
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- Nadine Defranoux
- 01-31-20
A real pleasure!
This book kept me engaged from story to finish as it walks along the journey meandering between body clock and social clock. Both non-scientist and scientists will get something out of it. The reading is perfect in rhythm as in pronunciation. The illustrations are thoroughly explained and can easily be followed verbally and a pdf also accompanied the audio book.
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- Matthew Kemmerer
- 04-19-19
Very educational, great facts, great narration!
I really loved listening to this audiobook, I listened to it on my commute to/from school, and always found myself intrigued and interested in what I was listening to. Narration was great as well as the writing. 10/10
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3 people found this helpful
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- fm2
- 08-27-14
well done if having a few trite anecdotes
Fascinating topic. The topic was both covered in depth but presented clearly enough for the general reader
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1 person found this helpful
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- Amazon Customer
- 12-15-17
great book about the working of the internal clock
absolutely loved it! the structure is great - a little story followed by some real scientific explanations (still understandable)
will tell everyone to read it
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- Jennifer
- 01-28-18
VERY Detailed, VERY
I chose this book after reading Daniel Pink's latest book "Timing" . Pink recommended this book in chronotypes. The book is quite detailed as Pink indicated. a bit too detailed and scholarly for my interest on this topic.
However, I love the idea is chronotypes and fitting your life into your energy and chronotypes.
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5 people found this helpful
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- Scott C.
- 10-22-18
Internal Time was both fun and engaging
I learned a lot about my own chronotype and how we as humans beings should work to better understand how to take others' into consideration for work and relationships.
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3 people found this helpful
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- Kico M
- 08-28-23
Good
This is a good book with many interesting takes. However, maybe because I had read about the theme in other books, this one did not bring me many new insights. I’m addition, I did not like much the way the book was structured.
Anyhow, if you never read about internal time, this is a good start.
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- Prashanth
- 04-12-18
Frustratingly boring
Went through half of the book and couldn't tolerate it more. the contents of the book seems mostly conjecture and is not very usable.
interpretation of behaviour of mine and algae and trying to relate to human clock cycles - I don't get the point.
the book seems very academic and might well be taken that way if it can be ascertained that the facts are indeed factual and not conjecture
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1 person found this helpful